砂滤池在世界范围内被广泛应用于饮用水处理中，它能直接截留源水中微生物及部分污染物。截留的微生物能在滤池中缓慢生长并生成生物膜，从而对源水中的污染物进一步降解转化，目前对该过程中微生物的功能特性还缺乏系统认知。本项目拟结合分子生态与化学表征技术对我国不同区域饮用水砂滤池进行调查试验研究，在明确滤池微生态系统构成及功能基础上，探究滤池微生态系统微生物及附着化学物质与出水水质的因果关系。进一步在反应器中探讨引入功能菌株（群），人工构建滤池微生态系统的可行性；识别工艺参数对微生态系统功能的影响程度，跟踪加入菌株（群）在微生态系统中的丰度变化及分析其对污染物去除的贡献。研究将完善饮用水滤池在净水中的作用与机制的基础理论，创新饮用水处理工艺优化技术。

Sand filtration is widely used in drinking water treatment. The microorganisms and pollutants could be directly retained in filter from the treatment. Meantime the retained microbes grow slowly to form a biofilm on the surface of filter material, which may further degrade and transform the influent pollutants. However we still do not fully understand the microbial function in this process and how to control it to improve the effluent quality. This project is to investigate the actual sand filters of drinking water in different districts of our country and will combine molecular approach and chemical characterization to explore the microbial composition and function in those sand filters. We aim to conduct a causal relationship among effluent quality, microbes, and adsorbed matters. Further, we will construct a sand filter reactor and prepare to introduce the selected bacteria strain(s) to the reactor for building up an artificial microbial ecosystem; discern impacts of technological parameters of reactor on artificial microbial ecosystem; track the relative abundance of inoculated strain(s) and elucidate its contribution for pollutants removal. Our study will advance the fundamental scientific theory of “the role and mechanism of sand filters in drinking water treatment” and innovate the drinking water treatment technique.